Improvement in furnace-grate bars



UNITED STATES PATENT OFFICE.

HENRY GERNER, OF NEW YORK, N. Y.

IMPROVEMENT IN FURNACE-GRATE BARS.

Specification forming part of Letters Patent N0. 44,622, dated October11, 1864.

To all whom it may concern:

Beit known that I, HENRY GERNER, of the city, county, and State of NewYork, have invented a new and Improved'Furnace-Grate Bar; and I dohereby declare that the following is a full, clear, and eXactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which- Figure 1 represents a sideelevation of my invention. Fig. 2 is a transverse vertical section ofthe same. I

Similar letters of reference indicate like parts. j

rlhis invention consists in the arrangement of a groove, extending in alongitudinal direction through the entire upper edge of a gratebar,which is provided with holes passing transversely through the same nearthe bottcm of the groove in such a manner that by the ashes accumulatingin said groove and by the current of air passing through the transverseholes and through the ashes in the groove the upper edge of thegrate-bar is kept comparatively cool and the burning out of the same isobviated or prevented.

The invention consists, also, in the application to the sides of eachgrate-bar of diamondshaped corrugated projections, which, by reason oftheir corrugations, allow the air to pass through between them, and bytheir peculiar shape prevent the ashes from lodging on their edge, sothat the fire can be always kept clean and the draft is not interrupted.

`A represents a grate-bar, cast of iron or made of any other suitablematerial. rIhe form of my grate-bar is peculiar. It is made thin andwide, so that its width makes up for the reduction in its thickness, andit is tapering off toward the bottom edge very little, so t'iat theexpansion of all parts of the bar is equal and a warping of the same isprevented.

The upper edge of iny bar is provided with a groove, a, extending fromone end to the (,t'ier, and about one-half an inch deep, (more or less,)according to the size of the bar, and a series of holes, b, leads fromthis groove to both sides, as clearly shown in the drawings. When thebar is used in a furnace, the groove c soon fills with ashes, and bytheair passing transversely through the holes b and through the ashes inthe groove the upper edge of the bar is kept comparatively cool, and tle burning out of the same is prevented. By this simple improvement I amenabled to produce grate-bars which last much longer than grate-bars ofthe usual construction.

Each of my bars is provided with three (more or less) diamond-shapedcorrugated projections, c, on its sides, as clearlyv shown in Fig. l ofthe drawings. The sharp points of the diamonds are turned upward, sothat the ashes are prevented from lodging thereon and from stopping upthe draft between the bars. The corrugations in the projections allowthe air to pass through. between them, and the Y draft is thus verylittle interrupted.

I am aware that most all grate-bars are provided'with projections ofsome kind to keep them separate one from the other, but theseprojections are generally made square and flat on top, and they affordroom for the ashes to lodge on and prevent the free passage of the airup to the tire. My diamond-shaped projections allow the air to pass upfreely, and no room is afforded on which the ashes might accumulate.

I claim as new and desire to secure by Letters Patent l. The groove a,extending in a longitudinal direction throughout the Lipper edge of thegrate-bar A, in combination with the transverse holes b, constructed andoperating substantially as and for the purpose set forth.

2. In combination with the aforesaid groove c and holes bb, thediamondshaped corruA gated projections c c, constructed and operating asspeciiied.

II'ENRXT IERNER. litncsses J. I. HALL,

WM. F. MCNAMARA.

